 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.core;

 import java.net.URL ;

 import org.eclipse.core.runtime.IAdaptable;

 /**
  * Install handler entry.
  * Associates an optional custom install handler with the feature.
  * Install handlers must implement the IInstallHandler interface.
  * <p>
  * Clients may implement this interface. However, in most cases clients should
  * directly instantiate or subclass the provided implementation of this
  * interface.
  * </p>
  * <p>
  * <b>Note:</b> This class/interface is part of an interim API that is still under development and expected to
  * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
  * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
  * (repeatedly) as the API evolves.
  * </p>
  * @see org.eclipse.update.core.InstallHandlerEntry
  * @see org.eclipse.update.core.IInstallHandler
  * @since 2.0
  */
 public interface IInstallHandlerEntry extends IAdaptable {

     /**
      * Returns optional URL used for browser-triggered installation handling.
      *
      * @return url
      * @since 2.0
      */
     public URL getURL();

     /**
      * Returns optional name of a library containing the install
      * handler classes. If specified, the referenced library
      * must be contained in the feature archive.
      *
      * @return install handler library name
      * @since 2.0
      */
     public String getLibrary();

     /**
      * Returns install handler name.
      * It is interpreted depending on the value of the library
      * specification. If library is not specified, the name
      * is intepreted as an identifier of a "global" install
      * handler registered in the <code>org.eclipse.update.core.installHandlers</code>
      * extension point. If library is specified, the name is interpreted
      * as a fully qualified name of a class contained in the
      * library. In both cases, the resulting class must
      * implement IInstallHandler. The class is dynamically loaded and
      * called at specific points during feature processing.
      * The handler has visibility to the API classes from the update plug-in,
      * and plug-ins required by the update plugin.
      *
      * @see IInstallHandler
      * @return handler name
      * @since 2.0
      */
     public String getHandlerName();

 }

